<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    
</body>
<script>
    var obj = {name: 'zhangli'}
    var arr = [1]
    console.dir(arr)
    console.log(arr.valueOf())
    var fn = function() {}
    console.dir(Function)
    console.dir(Object)
    console.log(Function.__proto__.__proto__ === Object.prototype)
    console.log(Object.prototype.isPrototypeOf(obj))
    console.log(Object.getPrototypeOf(obj))
</script>
</html>